This Louisville penthouse is a blank canvas for one couple's growing collection

With 2,000 works and counting, Kentucky collectors Laura Lee Brown and Steve Wilson were running out of space to display their contemporary-art collection. Their solution: build a second home, a penthouse in downtown Louisville with lots of white walls.

Ms. Brown, the 72-year-old great-granddaughter of the founder of liquor company Brown-Forman, whose brands include Jack Daniel's and Southern Comfort, and Mr. Wilson, a 65-year-old former public-relations officer for four Kentucky governors, had attempted to address their...